In Transformers PS2, you can reach higher heights without the "Highjump" equipment by jumping in robot mode, then switching to vehicle mode when you're about to descend ; you can get some equipment earlier than intended, even a powerful primary weapon at the first level with this trick.

You can cancel fall damage while you're in vehicle mode, just switch to robot mode when you're about to land.

The red blaster with full red equipment is overpowered because of the faster fire rate bonus, it's possible once you reach the fourth level.